Ajallooeian, F., Dubois, N., Ladd, S.N., Lever, M.A., Schubert, C.J., De Jonge, C. (2025) “Controls on brGDGT production in the seasonally anoxic water column and sediments of Rotsee (Lake Rot).” JGR-Biogeosciences 130, e2025JG009132. https://doi.org/10.1029/2025JG009132
Crocker, L., Guo, J.S., U’Ren, J.M., Pugliese, G., Ladd, N., Werner, C., Meredith, L.K. (2025) “Volatile organic compound (VOC) exchange in tropical leaf litter in response to wetting: an automated scheme to classify flux pulse dynamics.” JGR-Biogeosciences 130, e2025JG008774. https://doi.org/10.1029/2025JG008774
Camperio, G., Ladd, S.N., Prebble, M., De Jonge, C., Schneider, T., Argiriadis, E., Lloren, R., Nelson, D.B., Delahaie, A., Krentscher, C., Dubois, N. (2025) “Human-climate-environment interactions in Espiritu Santo, Vanuatu during the past millennium.” Frontiers in Earth Science 13:1613262. https://doi.org/10.3389/feart.2025.1613262
De Jonge, C., Dubois, N., Ladd, S. N., Deng, L., Gajenda, N., Haghipour, N., Schubert, C.J., Lever, M. (2025) “Holocene environmental change in Rotsee and its impact on sedimentary carbon storage.” Journal of Paleolimnology. https://doi.org/10.1007/s10933-025-00361-3
Klatt, A., De Jonge, C., Nelson, D.B., Reyes, M., Schubert, C.J., Dubois, N., Ladd, S.N. (2025) “Algal lipid distributions and hydrogen isotope ratios reflect phytoplankton community dynamics.” Geochimica et Cosmochimica Acta 394, 205-219. https://doi.org/10.1016/j.gca.2025.02.013
Ladd, S.N., Nelson, D.B., Matthews, B., Dyer, S., Limberger, R., Klatt, A., Narwani, A., Dubois, N., Schubert, C.J. (2025) “Taxon-specific hydrogen isotope signals in cultures and mesocosms facilitate ecosystem and hydroclimate reconstruction.” Geochimica et Cosmochimica Acta 390, 199-210. https://www.sciencedirect.com/science/article/pii/S001670372400629X
Camperio, G., Ladd, N., Prebble, M., Lloren, R., Argiriadis, E., Nelson, D.B., Krentscher, C., Dubois, N. (2024) “Sedimentary biomarkers of human presence and taro cultivation reveal early horticulture in Remote Oceania.” Communications Earth & Environment 5, 667. https://www.nature.com/articles/s43247-024-01831-8
Santos, R.N., Rodrigues, T., Naughton, F., Schefuß, E., Oliveira, D., Moreno, J, Raposeiro, P.M., Gil-Romera, G., Morgan, A., Leira, M., Domingues Gomes, S., Ladd, S.N., Trigo, R.M., Ramos, A., Hernández, A. (2024) “Understanding the Atlantic influence on climate and vegetation dynamics in Western Iberia over the last 2000 years.” Quaternary Science Reviews 337, 108796. DOI: 10.1016/j.quascirev.2024.108796
Liu, J., Ladd, S.N., Zhao, J., Yan, D., He, D., Cao, Y., An, Z. (2024) “Plant type effect overweighs seasonal variation in n-alkanoic acid biomarker on regional Loess Plateau of China.” Science China Earth Sciences 67, 2547-2562. DOI: 10.1007/s11430-023-1323-2
Huang, J., Ladd, S.N., Ingrisch, J., Kübert, A., Meredith, L.K., van Haren, J., Bamberger, I., Daber, L.E., Bailey, K., Hu, J., Fudyma, J., Shi, L., Dippold, M., Meeran, K., Miller, L., O’Brien, M.J., Yang, H., Herrera-Ramirez, D., Hartmann, H., Trumbore, S., Bahn, M., Werner, C., Lehmann, M.M. (2024) “The mobilization and transport of newly fixed carbon are driven by plant water use in an experimental forest under drought.” Journal of Experimental Botany 75, 2545-2557. DOI: 10.1093/jxb/erae030.
Ladd, S.N.ψ, Daber, L.E.ψ, Bamberger, I., Kübert, A., Kruezwieser, J., Perser, G., Ingrisch, J., Deleeuw, J., van Haren, J., Meredith, L.K., Werner, C. (2023) “Leaf-level metabolic changes in response to drought affect daytime CO2 emission and isoprenoid synthesis.” Tree Physiology 43, 1917-1932. DOI: 10.1093/treephys/tpad094 (ψEqual contributions).
Pugliese, G., Ingrisch, J., Meredith, L.K., Pfannerstill, E.Y., Kluepfel, T., Meeran, K., Byron, J., Purser, G., Gil-Loaiza, J., van Haren, J., Kreuzwieser, J., Ladd, S.N., Werner, C., Williams, J. (2023) “Effects of drought and recovery on soil volatile organic compound fluxes in an experimental rainforest.” Nature Communications 14, 5064. DOI: 10.1038/s41467-023-40661-8
Honeker, L., Pugliese, G., Ingrisch, J., Fudyma, J., Gil-Loaiza, J., Carpenter, E., Singer, E., Hildebrand, G., Shi, L., Hoyt, D., Chu, R., Toyoda, J., Krechmer, J., Claflin, M., Ayala-Ortiz, C., Freire-Zapata, V, Pfannerstill, E., Daber, L.E., Dippold, M., Kreuzwieser, J., Williams, J., Ladd, S.N., Werner, C., Tfaily, M., Meredith, L. (2023) “Drought re-routes soil microbial carbon metabolism towards emission of volatile metabolites in an artificial tropical rainforest.” Nature Microbiology 8, 1480-1494. DOI: 10.1038/s41564-023-01432-9
Hildebrand, G.A., Honeker, L.K., Fudyma, J., Daber, L.E., Amini Tabrizi, R., Ayala-Ortiz, C., Freier-Zapata, V., Chu, R.L., Toyoda, J., Flowers, S.E., Hoyt, D.W., Hamdan, R., Gil-Loaiza, J., Shi, L., Dippold, M., Ladd, S.N., Werner, C, Meredith, L.K., Tfaily, M.M. (2023) “Uncovering the dominant role of root metabolism in shaping rhizosphere metabolome under drought in tropical rainforest plants.” Science of the Total Environment 899, 165689. DOI: 10.1016/j.scitotenv.2023.165689
Kühnhammer, K., van Haren, J., Kübert, A., Bailey, K., Dubbert, M., Hu, J., Ladd, N., Meredith, L.K., Werner, C., Beyer, M. (2023) “Deep roots mitigate drought impacts on tropical trees despite limited quantitative contribution to transpiration.” Science of the Total Environment 893, 164763. DOI: 10.1016/j.scitotenv.2023.164763
Kübert, A., Dubbert, M., Bamberger, I., Kühnhammer, K., Beyer, M., van Haren, J., Bailey, K., Hu, J., Meredith, L.K., Ladd, S.N., Werner, C. (2023) “Tracing plant source water dynamics during drought by continuous transpiration measurements: an in-situ stable isotope approach.” Plant, Cell & Environment 46, 133-149. DOI: 10.1111/pce.14475
Byron, J., Kreuzwieser, J., Purser, G., van Haren, J., Ladd, S.N., Meredith, L., Werner, C., Williams, J. (2022) “Chiral monoterpenes reveal forest emission mechanisms and drought responses.” Nature 609, 307-312. DOI: 10.1038/s41586-022-05020-5
He, D., Ladd, S.N., Park, J., Sachs, J.P., Simoneit, B.R.T., Smoak, J.M., Jaffé, R. (2022) “Carbon and hydrogen isotopes of taraxerol in mangrove leaves and sediment cores: implications for paleo-reconstructions.” Geochimica et Cosmochimica Acta 324, 262-279. DOI: 10.1016/j.gca.2022.02.018
Honeker, L., Hildebrand, G., Fudyma, J., Daber, E., Hoyt, D., Flowers, S., Gil Loaiza, J., Kübert, A., Bamberger, I., Anderton, C., Cliff, J., Leichty, L., Amini Tabrizi, R., Kreuzwieser, J., Shi, L., Bai, X., Velickovic, D., Dippold, M., Ladd, S.N., Werner, C., Meredith, L., Tfaily, M. (2022) “Elucidating drought tolerance mechanisms in plant roots through 1H-NMR metabolomics, MALDI-MS, and NanoSIMS imaging technologies.” Environmental Science & Technology 56, 2021-2032. DOI: 10.1021/acs.est.1c06772
Hudson, C.M., Ladd, S.N., Leal, M.C., Schubert, C.J., Seehausen, O., Matthews, B. (2022) “Fit and fatty freshwater fish: Contrasting polyunsaturated fatty acid phenotypes between hybridizing stickleback lineages.” Oikos 2022: e08558. DOI: 10.1111/oik.08558
Werner, C.ψ, Meredith, L.K.ψ, Ladd, S.N.ψ, Ingrisch, J., Kübert, A., van Haren, J., Bahn, M., Bailey, K., Bamberger, I., Beyer, M., Blomdahl, D., Byron, J., Daber, E., Deleeuw, J., Dippold, M.A., Fudyma, J., Gil-Loazia, J., Honeker, L.K., Hu, J., Huang, J., Klüpfel, T., Krechmer, J., Kreuzwieser, J., Kühnhammer, K., Lehmann, M.M., Meeran, K., Misztal, P.K., Ng, W.-R., Pfannerstill, E., Pugliese, G., Purser, G., Roscioli, J., Shi, L., Tfaily, M., Williams, J. (2021) “Ecosystem fluxes during drought and recovery in an experimental forest.” Science 374, 1514-1518. DOI: 10.1126/science.abj6789 (ψEqual contributions)
Ladd, S.N., Nelson, D.B., Bamberger, I., Daber, L.E., Kreuzwieser, J., Kahmen, A., and Werner, C. (2021) “Metabolic exchange between pathways for isoprenoid synthesis and implications for biosynthetic hydrogen isotope fractionation.” New Phytologist 231, 1708-1719. DOI:10.1111/nph.17510
Twining, C.W., Bernhardt, J.R., Derry, A.M., Hudson, C.M., Ishikawa, A., Kabeya, N., Kainz, M., Kitano, J., Kowarik, C., Ladd, S.N., Leal, M.C., Scharnweber, K., Shipley, J.R., Matthews, B. (2021) “The evolutionary ecology of fatty-acid variation: implications for consumer adaptation and diversification.” Ecology Letters 24, 1709-1731. DOI: 10.1111/ele.13771
Madeira, C., Madeira, D., Ladd, N., Schubert, C.J., Diniz, M., Vinagre, C., and Leal, M.C. (2021) “Conserved fatty acid profiles and lipid metabolic pathways in a tropical reef fish exposed to ocean warming – an adaptation mechanism of tolerant species?” Science of the Total Environment 782, 146738. DOI: https://doi.org/10.1016/j.scitotenv.2021.146738
Ladd, S.N., Maloney, A.E., Nelson, D.B., Prebble, M., Camperio, G., Sear, D.A., Hassall, J., Langdon, P.G., Sachs, J.P., and Dubois, N. (2021) “Leaf Wax Hydrogen Isotopes as a Hydroclimate Proxy in the Tropical Pacific.” JGR-Biogeosciences 126, e2020JG005891. DOI: https://doi.org/10.1029/2020JG005891
He, D., Ladd, S.N., Saunders, C.J., Mead, R.N., Jaffé, R. (2020) “Distribution of n-alkanes and their δ2H and δ13C values in typical plants across the Everglades terrestrial-coastal-oceanic gradient: implications for paleo-reconstruction.” Geochimica et Cosmochimica Acta 281, 31-52. DOI: https://doi.org/10.1016/j.gca.2020.05.003
Haas M., Boltshauser-Kaltenrieder P., Ladd N., Welte C., Strasser M., Eglinton T.I., Dubois N. (2020) “Land-use evolution in the catchment of Lake Murten, Switzerland.” Quaternary Science Reviews 230, 106154. DOI: 10.1016/j.quascirev.2019.106154
Guillemot, T., Stockhecke, M., Bechtel, A., Ladd, S.N., Nelson, D.B., Schubert, C.J. (2019) “Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250- 130 ka (MIS7 and MIS6).” Quaternary Science Reviews 225, 105997. DOI: 10.1016/j.quascirev.2019.105997
Ishikawa A., Kabeya N., Ikeya K., Kakioka R., Cech J., Osada N., Leal M., Kume M., Toyoda A., Tezuka A., Nagano A., Yamasaki Y., Suzuki Y., Kokita T., Takahashi H., Lucek K., Marques D., Takehana Y., Naruse K., Mori S., Monroig O., Ladd N., Schubert C., Matthews B., Peichel C., Seehausen O., Yoshizaki G., Kitano J. (2019) “A key role for a fatty acid desaturase Fads2 in stickleback freshwater colonization.” Science 364, 886-889. DOI: 10.1126/science.aau5656
Krentscher, C., Dubois, N., Camperio, G., Prebble, M., Ladd, S.N. (2019) “Palmitone as a species-specific biomarker for the crop plant taro (Colocasia esculenta Schott.) on remote Pacific islands.” Organic Geochemistry 132, 1-10. DOI: 10.1016/j.orggeochem.2019.03.006
Park, J., Ladd, S.N., Sachs, J.P. (2019) “Hydrogen and Carbon Isotope Responses to Salinity in Greenhouse-grown Mangroves.” Organic Geochemistry 132, 23-36 DOI: 10.1016/j.orggeochem.2019.03.001
Ladd S.N., Nelson D.B., Schubert C.J., and Dubois N. (2018) “Lipid compound classes display diverging hydrogen isotope responses in lakes along a nutrient gradient.” Geochim. Cosmochim. Acta 237, 103-119. DOI: 10.1016/j.gca.2018.06.005
Nelson, D., Ladd S.N., Schubert, C.J., and Kahmen, A. (2018) “Rapid transport and large-scale deposition of recently synthesized plant biomarkers through aerosol processes.” Geochimica et Cosmochimica Acta 222, 599-617. DOI: 10.1016/j.gca.2017.11.018
Ladd, S.N., Dubois, N., and Schubert, C.J. (2017) “Interplay of community dynamics, temperature, and productivity on hydrogen isotope signatures of lipid biomarkers.” Biogeosciences 14, 3979-3994. DOI:10.5194/bg-14-3979-2017
He, D., Ladd, S.N., Sachs, J.P., and Jaffé, R. (2017) “Inverse relationships between salinity and 2H/1H fractionation in leaf wax n-alkanes from Florida mangroves.” Organic Geochemistry 110, 1-12. DOI:10.1016/j.orggeochem.2017.04.007
Ladd, S.N. and Sachs, J.P. (2017) “2H/1H fractionation in lipids of the mangrove Bruguiera gymnorhiza increases with salinity in marine lakes of Palau.” Geochimica et Cosmochimica Acta 204, 300-312. DOI: 10.1016/j.gca.2017.01.046
Ladd, S.N. and Sachs, J.P. (2015) “Influence of salinity on hydrogen isotope fractionation in Rhizophora mangroves from Micronesia.” Geochimica et Cosmochimica Acta 168, 206-221, DOI:10.1016/j.gca.2015.07.004
Ladd, S.N. and Sachs, J.P. (2015) “Hydrogen isotope response to changing salinity and rainfall in Australian mangroves.” Plant, Cell & Environment 38, 2674-2687, DOI:10.1111/pce.12579
Myrhvold, C.L., Janny, F., Nelson, D., Ladd S.N., Atwood, A., and Sachs, J.P. (2014) “Holocene Closure of Lib Pond, Marshall Islands.” PLoS One 9(3): e90939. DOI: 10.1371/journal.pone.0090939
Ladd, S.N. and Sachs, J.P. (2013) “Positive correlation between salinity and n-alkane δ13C values in the mangrove Avicennia marina.” Organic Geochemistry 64, 1-8, DOI: 10.1016/j.orggeochem.2013.08.011
Ladd, S.N. and Sachs, J.P. (2012) “Inverse relationship between salinity and n-alkane δD values in the mangrove Avicennia marina.” Organic Geochemistry 48, 25-36, DOI: 10.1016/j.orggeochem.2012.04.009
Sachs, J.P. and Ladd, S.N. (2010) “Climate and oceanography of the Galapagos in the 21st century: expected changes and research needs.” Galapagos Research 67, 50-54
Manuscripts under review or in revision
Camperio, G., Ladd, S.N., Prebble, M., Welte, C., Kumar, K., Dubois, N. “Bomb pulse dating in Vanuatu tracks past extreme events in areas lacking instrumental records.” In revision for Radiocarbon.
Holloway-Phillips, M., Lehmann, M.M., Tcherkez, G., Werner, R.A., Nelson, D.B., Baan, J., Cernusak, L., Cormier, M.-A., Diao, H., Gessler, A., Guidi, C., Hugger, S., Ladd, S.N., Martinez-Sancho, E., Niittlyä, T., Saurer, M., Schuler, P., Vitali, V., Wieloch, T., Kahmen, A. “Rethinking the 2H fingerprint of carbohydrates: a metabolic rather than hydrologic biomarker for plant performance.” In press at New Phytologist.
Touceda-Suarez, M., Ponsero, A.J., Honeker, L.K., Gil-Loiza, J., Fudyma, J., Clark, M., Werner, C., Ladd, S.N., Tfaily, M.M., Barberan, A., Meredith, L.K. “Soil viral response to drought disturbance and ecosystem recovery in an artificial rainforest.” In review at at Soil Biology and Biochemistry.
Santos, R.N., Nelson, D.B., Klatt, A.K., Schubert, C.J., Dubois, N., De Jonge, C., Ladd, S.N. “Central Europe hydroclimate since the Younger Dryas from vegetation-corrected sedimentary plant wax δ2H values.” In revision for Paleoceanography and Paleoclimatology.
Nemiah Ladd, PhD 